Indicator for locks.



P. F. AUGENBRAUN.

INDICATOR FOB LOCKS.

APPLIOATION FILED MAY za, 1911.

Patented Apr. 2, 1912.

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P. P. AUGBNBRAUN.

INDICATOR FOR LOCKS.

APPLIGATION FILED MAY za, 1911.

Patented Apr. 2, 1912.

2 SHEETS-SHEET 2.

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A Homey UNITED STATES I UQTENT OFFICE.

PETER F. AUGENBRAUN, OF STAMFORD, CONNECTICUT, ASSIGNOR T0 THE YALE &TOWNE MANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT.

INDICATOR FOR LOCKS.

Specification of Letters Patent.

Patented Apr. 2, 1912.

Application filed May 23, 1911. Serial No. 629,047.

To all whom it may concern.

Be it known that I, PETER F. AUGEN- BRAUN, of Stamford, in the county ofFairield and State of Connecticut, have invented certain new and usefulImprovements in Indicators for Locks; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to an improvement in indicators for locks, theobject being to provide a lock adapted particularly for hotel use, withmeans accessible from the outer or corridor side of the door, forindicating whether the door is locked from the inside, and it consistsin a finger piece or equivalent movable indicating member, mounted onthe outer escutcheon and provided with means located in the path ofmovement of a part of the lock and adapted to be engaged by said art, sothat said indicator when engaged y said part will be locked againstmovement, and when not engaged by said part will be free to be moved.

My invention further consists in the parts and combinations of parts andin the details of construction as will be more fully described andpointed out in the claims.

In the accompanying drawings, Figure 1 is a View in elevation of theescutcheon plate showing my improvement with the coperating parts of alock in dotted lines. Fig. 2 is a view in rear elevation of theescutcheon plate. Fig. 3 is a view in elevation of a portion of a lockshowing the bolt in its locked position and the manual indicator lockedagainstvmovement. Fig. i is a similar view showing t-he bolt unlockedand the indicator free. Fig. ta is a View in section through the innerand outer escutcheon plates and the lock, and Figs. 5, 6 and 7 are viewsof a modified form of locking means for the indicator.

1 represents an escutcheon plate provided with a finger piece or manualindicator 2, the shank of which passesthrough a slot in the escutcheonand is secured to the elbow of a bell crank lever 3 pivoted at i to theinner face of the escutcheon l. This bell crank lever 3 is provided witha spring 5 which tends to normally hold its free end out of contact withthe slide 6 slotted as shown in Fig. 2, and mounted on the studs 7secured `to the rear face of the escutcheon and passing through saidslots. The slide 6 is located under the free end of the bell crank lever3, and its upper edge forms a rest or stop for, and prevents anymovement of the latter when the door is locked, and is provided with aspring 8 which latter is carried by the slide and engages an abutment onthe escutcheon, and tends to hold the slide 6 at one extreme of itsmovement. This slide is also provided on its upper edge with a recess'9, which, when the slide is moved by the bolt mechanism, as will behereinafter described, will come under the free end of the bell crank,and permit the bell crank to be moved by pressure on the thumb piece orindicator 2. It will therefore be seen that when the slide 6 is in oneposition, the thumb piece or indicator will be locked against movement,and when in another position it will be free to move, and can be socombined with a movable part of a lock, that the locked indicator willindicate that the door is locked from the inside, and if movable,indicate that the door is not locked from the inside, or the arrangementcan be the reverse, so that the indicator if free, will indicate alocked door, and if locked, indicate that the door is unlocked. In theconst-rue tion shown the construction is such that when the door islocked from the inside, the indicator will be locked against movement.

In the construction shown in Figs. 1 to et, the lock has a bolt lockingslide l() mounted to move in the upper portion of the lock case 11, andprovided with a depending arm 12, which, when in one position, restsadjacent to the inner end of the head of the bolt 13 and locks the sameagainst retraction, and when in its other extreme, is out of the path oflnovement of the bolt. This slide is yieldingly held in position by thespring 14 carried thereby, engaging notches 15 in the lock casing, andis moved by the link 1G connected at one end to the slide and at itsother end to the cam 17. This cam has an angular opening therein toreceive the shank of the knob 18 located on the inner side of the door.By turning the knob 18 in one direction the locking slide will be movedoutwardly thus carrying its bolt locking arm l2 over to a position tolock the bolt 13 against retraction, thus locking the door from theinside, and when turned in the opposite direction withdraws the arm 12from the bolt 13 thus leaving the latter free to be retracted by thebolt retracting knob from the inside and by the key or knob from theoutside, The slide 6 on the rear face of the escutcheon 1 is providedwith a post 19 which extends through a slot in the door through a slotin the face plate of the lock and through a slot 20 in the slide 10.

As before explained th-e free end of the bell crank 3 normallyrests onthe upper edge of slide 6 and said bell crank and the finger piece orindicator 2 connected thereto, are normally locked against movement. Thepost 19 on slide 6 passes into or through a slot 20 in slide 10, andwhen the latter is in its eXtreme position to the left or when itsdepending arm 12 is deadlocking bolt 13, the post 19 will be locatedintermediate the end walls of the slot 20, thus leaving slide 6 in itsnormal position, with the bell crank resting against t-he upper edge ofthe slide and the indicator 2 immovable. lVhen however the bolt lockingslide 10 is shifted to the right so as to release the bolt, an end wallof the slot 2O in slide 10 engages post 19 and shifts the latter andslide 6 carrying same to the right until the recess 9 in slide 6 isunder the free end of the bell crank, thus removing the obstruction tothe operation of the bell-crank, and permitting the latter to be movedby the linger piece or indicator.

It will be apparent that the parts may be so arranged that the slide 10will, when moved to its position to deadlock the bolt actuate the postand slide 10 to release the indicator so that the latter will be free tobe moved when the door is locked Jfrom the inside, and be locked againstmovement when the door is not locked, and the recess in the slide 10,and the bell crank 3 may be so located relatively, that the slide mustbe moved to lock the indicator instead of releasing it.

In the construction shown in Figs. 5, 6 and 7, the slide 6 is dispensedwith and the post 191 is secured directly to the tree end of the bellcrank lever 3, and as the bell crank is pivoted at 4, the post 19a has amovement in the arc of a circle concentric with the pivot of the bellcrank. The post passes through a slot in the lock case, and is adaptedto be engaged by shoulder 21 on the bolt locking slide 10a. In Fig. 5,the slide 1()a is shown in its extreme position to the right with itsdepending arm 12 removed rom the bolt, and the shoulder 2l out of thepath of movement of the post. 19a. By now shifting the slide l0a to theleft or to its position for locking the bolt, the shoulder 21 will bemoved under the post and thus lock it and t-he indicator againstmovement.

In both constructions described the indicator is always outside of theescutcheon and has simply av sliding movement over the face of theescutcheon, and is superior to the push button type, because the maid orother attendant who wishes to see whether thc door is locked from theinside before trying her key does not have to push on the indicator andthus rattle the door, and possibly annoy or wake up the occupant of theroom.

It is evident that many slight changes might be resorted to in therelative arrangement of parts shown and described .without departingfrom the spirit and scope of my invention. I-Ience I would have itunderstood that I do not conne myself to the eX- act construction andarrangement of parts shown and described, but

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

dicator mounted to have a sliding movement over the outer face of saidescutcheon, a lever pivoted to the inner face of the escutcheon andcarrying said indicator, a lock having a movable member and meanscooperating with said pivoted lever and movable member of the lockwhereby when said movable `member of the lock is manually moved in onedirection it will engage a part of said cooperating means and lock theindicator against movement.

3. In a lock, the combination of an escutcheon having a slot therein, anindicator mounted to slide on the outer face of same, a bell crank leverpivoted to the inner face of said escutcheon and connected with theindicator, a lock having a movable member and a post interposed betweenthe indicator and said movable member of the lock, and coperating withboth, whereby the post will. be locked against movement and theindicator blocked, .when the movable member of the lock is in o-neposition.

t. In a lock, the combination of an escutcheon having a slot therein, anindicator mounted to slide on the outer face of same, a bell crankpivoted to the inner face of said escutcheon and connected to theindicator, a lock having a sliding element, a slide carried by theescutcheon and adapted when in one position to lock the bell crankagainst movement and a post carried by the slide on the escutcheon andadapted to be engaged and moved by the sliding element of the lock.

5. In a lock, the combination of an escutcheon having a slot therein, anindicator mounted to slide thereon, a spring actuated bell crank leverpivoted to the inner face of the escutcheon and connected to theindicator, a lock having a sliding element, :i side carried on the innerface of the cscutcheon and actuated in one direction by n spring, andprovided .With 2L recess into which the free end of the bell crank levermay be moved when said slide is in one position,

and a post carried by the slide on the escutcheon and adapted to heengaged and moved by the sliding element of the lock. In testimonywhereof, I have signed this specification in the presence of twosubscribing Witnesses.

PETER F. AUGENBRAU N. Witnesses:

REINi-IOLD SCHOELL, HAROLD S. VISDOM.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C."

